Dual solid state relay

Details Dual solid state relay Dual solid state relay

1990-12-21

1992-01-07

Mis, David

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307117, 307242, 307570, H03K 1772, H03K 1779

Patent

active

050794574

ABSTRACT:
A dual solid state relay comprised of an input circuit, an optical coupler, a reference voltage circuit, a switch circuit, an SCR saturation circuit, a full wave bridge rectifier, a TRIAC driver circuit, an SCR driver circuit, a TRIAC slave circuit, an SCR slave circuit, a snobber circuit, and an output port. The TRIAC slave circuit and the SCR slave circuit are driven by the TRIAC driver circuit and the SCR driver circuit, respectively. The relay circuit is designed to employ additional TRIACs and SCRs in the event that the switching of very high currents and voltages becomes necessary. A further feature of the present invention is a SPDT switch which allows the user the opportunity of choosing which part of the relay circuit is utilized (TRIAC or SCR).

REFERENCES:
patent: 4158150 (1979-06-01), Dever
patent: 4745311 (1988-05-01), Iwasaki

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